Make better code structure for border handlers

Sine Striker

2023-12-13 a51b5688e1c33d3ce96b48c869603b00f908f513

 src/quick/quickwindowagent_p.h

@@ -16,6 +16,10 @@

        // Host
        QQuickWindow *hostWindow{};

#ifdef Q_OS_WINDOWS
        void setupWindows10BorderWorkaround();
#endif
    };

}